import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int count = 0;
        int maxCount = 0;
        while(n != 0){
            if((n & 1) == 1){
                count++;
                maxCount = Math.max(count,maxCount);
            }else{
                count = 0;
            }
            n >>= 1;
        }
        System.out.print(maxCount);
    }
}

